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Noninvasive Positive-Pressure Ventilation for Acute Respiratory Failure: Comparative Effectiveness

Slide: 13 of 25

Rating the Strength of Evidence From the Comparative Effectiveness Review

Throughout this slide set, strength of evidence ratings are assigned to findings of the report. Strength of evidence is typically assigned to reviews of medical treatments after assessing four domains: risk of bias, consistency, directness, and precision. Although these categories were developed to assess the strength of treatment studies, the domains also apply to studies of prevalence and screening. Available evidence for each Key Question (KQ) was assessed for each of these four domains; the domains were combined qualitatively to develop the strength of evidence for each KQ.